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Toyota Sienna Service Manual: Pressure Control Solenoid "A" Performance (Shift Solenoid Valve SL1)

Toyota Sienna Service Manual / U151e automatic transaxle / Automatic transaxle system / Diagnostic trouble code chart / Pressure Control Solenoid "A" Performance (Shift Solenoid Valve SL1)

Pressure Control Solenoid "A" Performance (Shift Solenoid Valve SL1)

SYSTEM DESCRIPTION

The ECM uses signals from the vehicle speed sensor to detect the actual gear position (1st, 2nd, 3rd, 4th or 5th gear).

Then the ECM compares the actual gear with the shift schedule in the ECM memory to detect mechanical problems of the shift solenoid valves, valve body or automatic transaxle (clutch, brake or gear etc.).

MONITOR DESCRIPTION

The ECM commands gear shifts by turning the shift solenoid valves "ON/OFF". According to the input shaft revolution, intermediate (counter) shaft revolution and output shaft revolution, the ECM detects the actual gear position (1st, 2nd, 3rd, 4th or 5th gear position). When the gear position commanded by the ECM and the actual gear position are not the same, the ECM illuminates the MIL.

HINT: Example: When either condition (a) or (b) is met, the ECM detects a malfunction.

(a) The ECM commands the 1st gear, but the actual gear is 2nd.

(b) The ECM commands the 2nd gear, but the actual gear is 1st.

MONITOR STRATEGY

MONITOR STRATEGY

TYPICAL ENABLING CONDITIONS

TYPICAL ENABLING CONDITIONS

TYPICAL ENABLING CONDITIONS

TYPICAL MALFUNCTION THRESHOLDS

Either of the following conditions is met: OFF malfunction or ON malfunction OFF malfunction: 2 detections are necessary per driving cycle: 1st detection; temporary flag ON 2nd detection; pending fault code ON

INSPECTION PROCEDURE

HINT: Using the intelligent tester to perform ACTIVE TEST allows relays, VSVs, actuators and other items to be operated without removing any parts. This non-intrusive functional inspection can be very useful because intermittent operation may be discovered before parts or wiring is disturbed. Performing ACTIVE TEST early in troubleshooting is one way to save diagnostic time. DATA LIST information can be displayed while performing ACTIVE TEST.

1. PERFORM ACTIVE TEST

(a) Warm up the engine.

(b) Turn the ignition switch off.

(c) Connect the intelligent tester together with the CAN VIM (controller area network vehicle interface module) to the DLC3.

(d) Turn the ignition switch to the ON position.

(e) Turn on the tester.

(f) Select the item "DIAGNOSIS / ENHANCED OBD II / ACTIVE TEST / SHIFT".

(g) According to the display on the tester, perform the "ACTIVE TEST".

HINT: While driving, the shift position can be forcibly changed with the intelligent tester.

Comparing the shift position commanded by the ACTIVE TEST with the actual shift position enables you to confirm the problem (See page AX-30).

HINT:

1 CHECK OTHER DTCS OUTPUT (IN ADDITION TO DTC P0746)

(a) Connect the intelligent tester together with the CAN VIM (controller area network vehicle interface module) to the DLC3.

(b) Turn the ignition switch to the ON position and turn the OBD II scan tool or the intelligent tester main switch ON.

(c) When you use intelligent tester: Select the item "DIAGNOSIS / ENHANCED OBD II / DTC INFO / CURRENT CODES".

(d) Read the DTCs using the OBD II scan tool or the intelligent tester.

Result

HINT: If any other codes besides "P0746" are output, perform the troubleshooting for those DTCs first.

2 INSPECT SHIFT SOLENOID VALVE SL1

 INSPECT SHIFT SOLENOID VALVE SL1

(a) Remove the shift solenoid valve SL1.

(b) Measure the resistance according to the value(s) in the table below.

Standard resistance

(c) Connect the positive (+) lead with a 21 W bulb to terminal 2 and the negative (-) lead to terminal 1 of the solenoid valve connector, then check the movement of the valve.

OK: The solenoid makes an operating sound.

3 INSPECT TRANSMISSION VALVE BODY ASSEMBLY

OK: There are no foreign objects on each valve and they operate smoothly.

4 INSPECT TORQUE CONVERTER CLUTCH ASSEMBLY

OK: The torque converter clutch operates normally.

REPAIR OR REPLACE AUTOMATIC TRANSAXLE ASSEMBLY

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Pressure Control Solenoid "A" Electrical (Shift Solenoid Valve SL1)
DESCRIPTION Shifting from 1st to 5th is performed in combination with "ON" and "OFF" operation of the shift solenoid valves SL1, SL2, SL3, S4 and SR which are controlled by ...

Other materials:

Installation
HINT: Install the RH side by the same procedure as the LH side. 1. INSTALL REAR SPEED SENSOR (a) Clean the contacting surface of the axle hub and a new skid control sensor. NOTICE: Keep the sensor rotor clean. (b) Place the speed sensor on the axle hub so that the connector is positioned ...

If the battery is discharged
The following procedures may be used to start the engine if the vehicle’s battery is discharged. You can call your Toyota dealer or qualified repair shop. If you have a set of jumper (or booster) cables and a second vehicle with a 12-volt battery, you can jump start your vehicle by following ...

Removal
1. REMOVE REAR WHEEL 2. REMOVE EXHAUST PIPE ASSEMBLY HINT: Perform this procedure only when removing the RH side. (See page EX-8) 3. REMOVE REAR SPEED SENSOR LH HINT: (See page DS-21) 4. REMOVE REAR AXLE SHAFT NUT LH HINT: (See page DS-21) 5. REMOVE REAR DRIVE SHAFT ASSEMBLY LH HINT: ...

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